Need help with exporting from Materialize
Your program creates several maps - including a height map. Don't use it as a bump map. If you want to use bumps, get Materialize to generate a normal map for you (bump is a cheap cheat)
However if you want to use actual displaced geometry, use the height map, transfer it to a Displace Vector with a Vector -> Displacement node and plug it into the Displacement slot of your Material Output Node. 
There are a few more options you will want to consider, too long to explain them here, the keyword to google for is: true displacement subdivision.